JPS56115172A - Protecting circuit of main thyrister - Google Patents

Protecting circuit of main thyrister

Info

Publication number
JPS56115172A
JPS56115172A JP1715580A JP1715580A JPS56115172A JP S56115172 A JPS56115172 A JP S56115172A JP 1715580 A JP1715580 A JP 1715580A JP 1715580 A JP1715580 A JP 1715580A JP S56115172 A JPS56115172 A JP S56115172A
Authority
JP
Japan
Prior art keywords
main
thyrister
output signal
state
main thyrister
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1715580A
Other languages
Japanese (ja)
Inventor
Satoru Iwahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyoda Automatic Loom Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Automatic Loom Works Ltd filed Critical Toyoda Automatic Loom Works Ltd
Priority to JP1715580A priority Critical patent/JPS56115172A/en
Publication of JPS56115172A publication Critical patent/JPS56115172A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements

Abstract

PURPOSE:To prevent the main thyrister from commutation failure and damage by shutting the supply power source when the forward voltage of the main thyrister is risen above a fixed value. CONSTITUTION:When the load current IB flowing in the DC motor 2 exceeds the minimum allowable ''ON'' current of the main thyrister 3, said forward voltage Vs is detected to put out the output signal SG3. As at this time the main thyrister is in the state of ''ON'', the transistor 21 is in the state of ''OFF'', the output signal SG3 is put into the contact making circuit 25 to make the contact 9 to leave off. And when the main thyrister 3 is in the state of ''OFF'', similarly the output signal SG3 is put out, while the output signal SG3 is not put into the contact making circuit because the transistor 21 is turned ''ON'' in the state of ''OFF'' of the main thyristor 3. Thereby when the load current exceeds the maximum allowable ''ON'' current, immediately the power source is cut off to prevent the main thyrister from commutation failure and damage.
JP1715580A 1980-02-14 1980-02-14 Protecting circuit of main thyrister Pending JPS56115172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1715580A JPS56115172A (en) 1980-02-14 1980-02-14 Protecting circuit of main thyrister

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1715580A JPS56115172A (en) 1980-02-14 1980-02-14 Protecting circuit of main thyrister

Publications (1)

Publication Number Publication Date
JPS56115172A true JPS56115172A (en) 1981-09-10

Family

ID=11936082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1715580A Pending JPS56115172A (en) 1980-02-14 1980-02-14 Protecting circuit of main thyrister

Country Status (1)

Country Link
JP (1) JPS56115172A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113514744A (en) * 2021-09-14 2021-10-19 中国南方电网有限责任公司超高压输电公司检修试验中心 Method and device for determining withstand voltage value of thyristor and storage medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017164A (en) * 1973-06-13 1975-02-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017164A (en) * 1973-06-13 1975-02-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113514744A (en) * 2021-09-14 2021-10-19 中国南方电网有限责任公司超高压输电公司检修试验中心 Method and device for determining withstand voltage value of thyristor and storage medium

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